Essential tools for you. If you want to transform your screw driver into a full-fledged drill, this Quick Change Drill Chuck is exactly what you are looking for. Features: Mini electric grinding drill chuck. Allow hex drive power tools to use general drill bits. Hold the drill bits and accessories up to 1/4" in Diameter. Easily lock onto and release drill bits. Convert any cordless screwdriver into a drill or grinder. Transform the chuck way between different electric tools. Specifications: Color: Silver + Black Material: Aluminium Alloy Hex Shank Diameter: 6.35mm / 1/4" Clamping Range: 0.3-6.5mm / 0.012-0.256" Overall Length: 7-9cm / 2.76-3.54" Length of Shank: 58mm / 2.28" Diameter of Head: 22mm / 0.866" Item Size: 9 * 2.2cm / 3.54 * 0.866" (L * D) Item Weight: Approx. 41g / 1.45oz Package Weight: Approx. 43g / 1.52oz Package Size: Approx. 9 * 3 * 3cm / 3.54 * 1.18 * 1.18in Package List: 1 * Quick Change Drill Chuck